CN103675624A - Power-frequency voltage testing device and testing method of lightning arrester - Google Patents
Power-frequency voltage testing device and testing method of lightning arrester Download PDFInfo
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- CN103675624A CN103675624A CN201310680983.3A CN201310680983A CN103675624A CN 103675624 A CN103675624 A CN 103675624A CN 201310680983 A CN201310680983 A CN 201310680983A CN 103675624 A CN103675624 A CN 103675624A
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Abstract
The invention discloses a power-frequency voltage testing device and testing method of a lightning arrester. The testing device comprises a charging loop and a capacitor which is charged through the charging loop. The capacitor is connected with an inductor to form a series resonance circuit, a tested object is connected with the inductor in parallel, and power-frequency voltages are applied to the tested object through the inductor. A voltage divider used for testing voltages of the tested object and a current divider used for testing currents of the tested object are connected between the tested object and the inductor. A first switch is mounted on the series resonance circuit which is formed by the capacitor and the inductor, and the tested object is connected with a wave modulation inductor and a second switch and then is connected with the inductor. The voltage divider and the current divider are connected with a testing device used for testing the voltages and the currents respectively. Series resonance is generated through the capacitor and the inductor, the power-frequency voltages generated on the inductor are applied to the tested object, the turn-on time of the second switch is controlled, so that the time of the power-frequency voltages applied to the tested object is controlled, a large-capacity short duration power frequency voltage withstand test of the lightning arrester is achieved, and the power-frequency voltages and current waveform parameters of the lightning arrester can be tested and recorded.
Description
Technical field
The present invention relates to test of lightning arrester field, particularly a kind of lightning arrester power-frequency voltage test unit and test method.
Background technology
Lightning arrester is the important protective device of electric system, widespread use in electric system and string benefit device, and the measurement of lightning arrester power frequency parameter and research are very important to lightning arrester with coordinating of systematic parameter, especially string are mended to device lightning arrester.Testing laboratory adopt testing transformer to lightning arrester the characteristic under the power-frequency voltage of low capacity can measure, for jumbo power-frequency voltage test, the transformer investment needing is very large, experimental provision is bulky, complex structure, testing laboratory also cannot carry out surpassing the jumbo resistors power-frequency voltage test of 1000kVA at present.
Summary of the invention
The object of the present invention is to provide a kind of lightning arrester power-frequency voltage test unit and test method, solve existing proving installation and cannot realize the problem over the large capacity resistors power-frequency voltage test of 1000kVA.
In order to achieve the above object, the present invention gives and realizing by the following technical solutions:
A kind of lightning arrester power-frequency voltage test unit, comprise charge circuit, the capacitor charging by charge circuit, capacitor and inductance are connected to form series resonant tank, test product and inductance in parallel, be that test product applies power-frequency voltage by inductance, is connected with for measuring voltage divider and the shunt of test product voltage and current between test product and inductance, in the series resonant tank that capacitor and inductance form, switch one is installed, test product connects harmonic inductance and is connected with inductance with after switch two; Described charge circuit, switch one and switch two are connected with the control module of controlling its work, and described voltage divider and shunt are connected with the measuring unit of measuring respectively its voltage and current.
Described charge circuit adopts constant pressure source or constant current source.
Described capacitor is comprised of 25～30 Parallel-connected Capacitors.
Described inductance adopts many taps mode to obtain different inductance values, tuning for resonant tank.
Described harmonic inductance adopts many taps mode to obtain different inductance values, for adjusting the waveform of test loop.
Described measuring unit comprises capture card, utilizes capture card to gather respectively the voltage waveform of voltage divider and shunt.
Described voltage divider adopts high-voltage probe, capacitive divider or resitstance voltage divider; Described shunt adopts divertor or current mutual inductor coil.
Described measuring unit is provided with has the interface that telecommunication is provided to host computer.
A lightning arrester power-frequency voltage test method, control module sends control signal to respectively charge circuit, switch one and switch two, makes capacitor charging, then switch one and switch two closures; Capacitor and inductance produce series resonance, and the power-frequency voltage producing on inductance is applied on test product by harmonic inductance and switch two, by the opening time of gauge tap two, controls the power-frequency voltage time being applied on test product; Measuring unit gathers respectively the voltage waveform of voltage divider and shunt, and the voltage and current waveform parameter by test product is collected in computing machine and analyzed and record.
Power-frequency voltage amplitude on described test product is 1kV～6kV, and power current amplitude is 0.01kA～2kA, duration 0.01s～0.2s.
It is capacitor charging that the present invention adopts charge circuit, capacitor charges afterwards and inductance produces series resonance, the power-frequency voltage producing on inductance is applied on test product by harmonic inductance and switch two, measuring unit gathers respectively the voltage waveform of voltage divider and shunt, voltage and current waveform parameter by test product is collected in computing machine and analyzed and record, realized the jumbo power frequency withstand test in short-term of lightning arrester, and measurement and the record of the power-frequency voltage of lightning arrester and current waveform parameter, by the opening time of switch two, control the power-frequency voltage time being applied on test product, this power-frequency voltage test unit investment is little, loss is low
Further, measuring unit is provided with the interface that telecommunication is provided to host computer, can directly measurement parameter be delivered to host computer and calculate, analyzes, and practicality is stronger.
Accompanying drawing explanation
Fig. 1 is the structural representation of test unit of the present invention
In figure: 1, charge circuit; 2, capacitor; 3, switch one; 4, inductance; 5, harmonic inductance; 6, switch two; 7, test product; 8, voltage divider; 9, shunt; 10, measuring unit; 11, control module.
Embodiment
With reference to Fig. 1, this lightning arrester power-frequency voltage test unit, comprises charge circuit 1, capacitor 2, switch 1, inductance 4, harmonic inductance 5, switch 26, voltage divider 8, shunt 9, test product 7, measuring unit 10, control module 11.
Charge circuit 1 adopts constant pressure source or constant current source, charge circuit 1 is connected to capacitor 2 chargings with capacitor 2, capacitor is comprised of 25～30 Parallel-connected Capacitors, capacitor and inductance are connected to form series resonant tank, capacitor 2 and inductance 4 produce series resonance, test product 7 is in parallel with inductance 4, by inductance 4, for test product 7, apply power-frequency voltage, between test product 7 and inductance 4, be connected with for measuring voltage divider 8 and the shunt 9 of test product 7 voltage and currents, described voltage divider adopts high-voltage probe, capacitive divider or resitstance voltage divider; Described shunt adopts divertor or current mutual inductor coil.The inductance value of described inductance 4 adopts many taps mode to obtain different inductance values, be used for the tuning of resonant tank, in the series resonant tank that capacitor and inductance form, switch 1 is installed, test product connects harmonic inductance 5 and is connected with inductance 4 with after switch 26, described harmonic inductance 5 adopts many taps mode to obtain different inductance values, for adjusting the waveform of test loop; Test product is lightning arrester non-linear resistor; Described charge circuit 1, switch 1 and switch 26 are connected with the control module 11 of controlling its work, and control module is comprised of programming devices such as single-chip microcomputer, DSP, and described voltage divider 8 and shunt 9 are connected with the measuring unit 10 of measuring respectively its voltage and current.
Further, described measuring unit comprises capture card, utilize capture card to gather respectively the voltage waveform of voltage divider and shunt, measuring unit is provided with has the interface that telecommunication is provided to host computer, described communication interface is RS485 interface, optical fiber interface or wireless communication interface, and measuring-signal can carry out signal transmission by communication cable, optical fiber and wireless telecommunications while transmitting.
This test unit has been realized the jumbo industrial frequency withstand voltage in short-term of lightning arrester, and measurement and the record of the power-frequency voltage of lightning arrester and current waveform parameter, and this device also has to host computer simultaneously provides remote communication interface function.
Meanwhile, the invention also discloses a kind of lightning arrester power-frequency voltage test method:
Power-frequency voltage amplitude on test product 7 is 1kV～6kV, and power current amplitude is 0.01kA～2kA, duration 0.01s～0.2s; Measuring unit 10 utilizes capture card, gathers respectively the voltage waveform of voltage divider 8 and shunt 9, and the power-frequency voltage that test product 7 is born and power current waveform parameter collect in computing machine to be analyzed and record.
The present invention is that capacitor charges by charge circuit, capacitor becomes series resonant tank with inductive bank, and it is 1kV～6kV that resonance produces voltage, the power-frequency voltage that electric current is 0.01kA～2kA, comparing traditional experiment device adopts transformer to produce the power-frequency voltage of high voltage and current, test unit of the present invention is simple in structure, and cost is low, by the opening time of switch, realization is applied to the power-frequency voltage time on test product, control method is simple, easily realizes, and extends to the large capacity test device of this class and uses.
Claims (10)
1. a lightning arrester power-frequency voltage test unit, it is characterized in that, comprise charge circuit (1), by the capacitor (2) of charge circuit (1) charging, capacitor (2) is connected to form series resonant tank with inductance (4), test product (7) is in parallel with inductance (4), by inductance (4), for test product (7), apply power-frequency voltage, between test product (7) and inductance (4), be connected with for measuring voltage divider (8) and the shunt (9) of test product (7) voltage and current, in the series resonant tank that capacitor (2) and inductance (4) form, switch one (3) is installed, test product (7) connects harmonic inductance (5) and is connected with inductance (4) with after switch two (6), described charge circuit (1), switch one (3) and switch two (6) are connected with the control module (11) of controlling its work, and described voltage divider (8) and shunt (9) are connected with the measuring unit (10) of measuring respectively its voltage and current.
2. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described charge circuit (1) adopts constant pressure source or constant current source.
3. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described capacitor (2) is comprised of 25～30 Parallel-connected Capacitors.
4. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described inductance (4) adopts many taps mode to obtain different inductance values, tuning for resonant tank.
5. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described harmonic inductance (5) adopts many taps mode to obtain different inductance values, for adjusting the waveform of test loop.
6. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described measuring unit (10) comprises capture card, utilizes capture card to gather respectively the voltage waveform of voltage divider (8) and shunt (9).
7. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described voltage divider (8) adopts high-voltage probe, capacitive divider or resitstance voltage divider; Described shunt (9) adopts divertor or current mutual inductor coil.
8. lightning arrester power-frequency voltage test unit according to claim 1, is characterized in that, described measuring unit (10) is provided with has the interface that telecommunication is provided to host computer.
9. the lightning arrester power-frequency voltage test method based on claim 1 test unit, it is characterized in that, control module (11) sends control signal to respectively charge circuit (1), switch one (3) and switch two (6), make capacitor (2) charging, then switch one (3) and switch two (6) closures; Capacitor (2) and inductance (4) produce series resonance, the upper power-frequency voltage producing of inductance (4) is applied on test product (7) by harmonic inductance (5) and switch two (6), by the opening time of gauge tap two (6), control the power-frequency voltage time being applied on test product (7); Measuring unit (10) gathers respectively the voltage waveform of voltage divider (8) and shunt (9), and the voltage and current waveform parameter by test product (7) is collected in computing machine and analyzed and record.
10. lightning arrester power-frequency voltage test method according to claim 9, is characterized in that, the power-frequency voltage amplitude on described test product (7) is 1kV～6kV, and power current amplitude is 0.01kA～2kA, duration 0.01s～0.2s.
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| CN103941125A (en) * | 2014-04-23 | 2014-07-23 | 南方电网科学研究院有限责任公司 | Current distribution test device and test method |
| CN104459501A (en) * | 2014-12-25 | 2015-03-25 | 中国西电电气股份有限公司 | Lightning arrester power frequency testing device and method |
| CN104459417A (en) * | 2014-12-25 | 2015-03-25 | 中国西电电气股份有限公司 | Energy tolerance testing device and method |
| CN106646051A (en) * | 2016-12-27 | 2017-05-10 | 中国西电电气股份有限公司 | Lightning arrester testing device and lightning arrester testing method |
| CN110174561A (en) * | 2019-04-24 | 2019-08-27 | 国网浙江省电力有限公司宁波供电公司 | Arrester test macro based on inductance-regulation resonance |
| CN110703059A (en) * | 2019-11-13 | 2020-01-17 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Device for improving tuning stability of series resonance test under small load |
| CN112816807A (en) * | 2020-11-17 | 2021-05-18 | 国网宁夏电力有限公司检修公司 | Lightning arrester volt-ampere characteristic field test device and method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103941125A (en) * | 2014-04-23 | 2014-07-23 | 南方电网科学研究院有限责任公司 | Current distribution test device and test method |
| CN103941125B (en) * | 2014-04-23 | 2017-03-29 | 南方电网科学研究院有限责任公司 | Current distribution test device and test method |
| CN104459501A (en) * | 2014-12-25 | 2015-03-25 | 中国西电电气股份有限公司 | Lightning arrester power frequency testing device and method |
| CN104459417A (en) * | 2014-12-25 | 2015-03-25 | 中国西电电气股份有限公司 | Energy tolerance testing device and method |
| CN104459417B (en) * | 2014-12-25 | 2018-05-29 | 中国西电电气股份有限公司 | A kind of energy resistance test device and test method |
| CN106646051A (en) * | 2016-12-27 | 2017-05-10 | 中国西电电气股份有限公司 | Lightning arrester testing device and lightning arrester testing method |
| CN106646051B (en) * | 2016-12-27 | 2019-12-13 | 中国西电电气股份有限公司 | Lightning arrester testing device and method |
| CN110174561A (en) * | 2019-04-24 | 2019-08-27 | 国网浙江省电力有限公司宁波供电公司 | Arrester test macro based on inductance-regulation resonance |
| CN110703059A (en) * | 2019-11-13 | 2020-01-17 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Device for improving tuning stability of series resonance test under small load |
| WO2021093352A1 (en) * | 2019-11-13 | 2021-05-20 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Apparatus for improving tuning stability of series resonance test under small load |
| CN110703059B (en) * | 2019-11-13 | 2021-08-17 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Device for improving tuning stability of series resonance test under small load |
| CN112816807A (en) * | 2020-11-17 | 2021-05-18 | 国网宁夏电力有限公司检修公司 | Lightning arrester volt-ampere characteristic field test device and method |
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Effective date of registration: 20180420 Address after: 710016 Kai Xin mansion 130, Weiyang Road, Xi'an, Shaanxi. Co-patentee after: China XD Electronic Corporation Patentee after: XI'AN XD ARRESTER CO., LTD. Address before: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee before: China XD Electronic Corporation |